PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

2 bar tune question/Issue

Thread Tools
 
Search this Thread
 
Old Oct 9, 2016 | 11:58 PM
  #1  
Darren P's Avatar
Thread Starter
10 Second Club
20 Year Member
iTrader: (1)
 
Joined: Sep 2004
Posts: 717
Likes: 0
From: Fairview NC (near Charlotte)
Default 2 bar tune question/Issue

I'm trying to tune the base fuel map for my 2002 Camaro with APS twins and a 403. I've got my boost enrichment set to enable at 110 Kpa and to disable at 85 Kpa and it has a multiplier of 1.25 and should be commanding 11.70, which it does. The problem is when it goes past 110 Kpa, then drops back below 85Kpa, it continues to command 11.70 until I cut the car off. I'm stumped. Tune and Scan are both attached.
Attached Files
File Type: hpt
massive VE change.hpt (316.4 KB, 101 views)
File Type: hpl
test drive ve change 1.hpl (560.8 KB, 84 views)
Reply
Old Oct 10, 2016 | 01:07 AM
  #2  
subeone's Avatar
TECH Fanatic
10 Year Member
iTrader: (5)
 
Joined: Apr 2013
Posts: 1,317
Likes: 93
Default

set your hysteresis to 5kpa on the boost enrichment. That should fix your issues.
Reply
Old Oct 10, 2016 | 05:56 AM
  #3  
Darren P's Avatar
Thread Starter
10 Second Club
20 Year Member
iTrader: (1)
 
Joined: Sep 2004
Posts: 717
Likes: 0
From: Fairview NC (near Charlotte)
Default

That does not make sense because the car ran fine with it set to 85 Kpa before I put the new engine in. Should come out of boost enrichment as soon as it's below 85 Kpa. With a small Turbo from the APS kit it can see in the boost to activate the Boost enrichment just under normal driving
​​​​​​

Last edited by Darren P; Oct 10, 2016 at 12:17 PM.
Reply
Old Oct 10, 2016 | 04:11 PM
  #4  
subeone's Avatar
TECH Fanatic
10 Year Member
iTrader: (5)
 
Joined: Apr 2013
Posts: 1,317
Likes: 93
Default

Enable MAP Hysteresis: This value is subtracted from the enable MAP value. If the MAP reading drops below this value then PE mode will be disabled

110kpa -85kpa= 25 kpa is the value to hit AFTER boost enrichment for it to disable. If you set it at 5 kpa, 105kpa-5 kpa, 100kpa is required to exit boost enrichment. If this doesnt help then im not sure what the issue is. Maybe check the map sensor or the integrity of the OS.
Reply




All times are GMT -5. The time now is 10:48 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE